Bone Morphogenetic Proteins in Lumbar Arthrodesis: What Is All the Debate About? Commentary on an article by Daniel C. Beachler, PhD, MHS, et al.: "Bone Morphogenetic Protein Use and Cancer Risk Among Patients Undergoing Lumbar Arthrodesis: A Case-Cohort Study Using the SEER-Medicare Database". J Bone Joint Surg Am. 2016 07 06; 98(13):e57.